Abstract: A user equipment (UE) executes a semi-static channel access method during a random access procedure in an unlicensed band. A base station transmits configuration information and downlink (DL) information to the UE in a fixed frame period (FFP) according to a set of FFP parameters associated with the base station. The UE determines whether to initiate a channel occupancy time (COT) in an FFP according to a set of FFP parameters associated with the UE based on one or more of: at least one condition in the configuration information, at least one condition in scheduling information, at least one condition in DL information, and a detection result of detecting transmission of the DL information. The base station determines whether to use the UE-initiated COT shared from the UE.

Abstract: A user equipment (UE) and a base station (BS) are provided. The UE monitors a plurality of semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) resources, and determines an SPS Hybrid Automatic Repeat reQuest acknowledge (HARQ-ACK) bit order of a plurality of SPS HARQ-ACK bits, corresponding to the SPS PDSCH resources, in a codebook according to a time-domain position, a component carrier index and a configuration index of each SPS PDSCH resource. Afterwards, the UE generates an HARQ-ACK message including the codebook according to the SPS HARQ-ACK bit order, and transmits the HARQ-ACK message on a physical uplink control channel (PUCCH) resource to the BS.

Abstract: A user equipment (UE) executes a semi-static channel access method during a random access procedure in an unlicensed band. A base station transmits configuration information and downlink (DL) information to the UE in a fixed frame period (FFP) according to a set of FFP parameters associated with the base station. The UE determines whether to initiate a channel occupancy time (COT) in an FFP according to a set of FFP parameters associated with the UE based on one or more of: at least one condition in the configuration information, at least one condition in scheduling information, at least one condition in DL information, and a detection result of detecting transmission of the DL information. The base station determines whether to use the UE-initiated COT shared from the UE.

Abstract: A user equipment (UE) executes a hybrid automatic repeat request (HARQ) processing method to reduce HARQ-ACK payload by selecting semi persistent scheduling (SPS) physical downlink shared channels (PDSCHs) on a plurality of periodic SPS PDSCH resources and reporting HARQ-ACKs for the selected SPS PDSCHs. Alternatively, the UE reduces HARQ-ACK payload by reducing HARQ-ACK bits for SPS PDSCH occasions or for SPS PDSCHs. Alternatively, the UE reduces HARQ-ACK payload by skipping HARQ-ACK feedback, such as a HARQ-ACK codebook, for the SPS PDSCHs. The UE determines an adjusted slot or sub-slot location for transmission of a HARQ-ACK bit for an SPS PDSCH at slot or sub-slot n when a symbol in an original slot or sub-slot location for transmission of the HARQ-ACK bit for an SPS PDSCH is invalid or has collision.

Abstract: A user equipment (UE) and a base station (BS) for a mobile communication system are provided. The UE receives, from the BS, a first downlink control information (DCI) indicating a first uplink resource for transmitting a first uplink signal, and then receives, from the BS, a second DCI indicating a second uplink resource for transmitting a second uplink signal. The BS configures the second uplink resource to be advanced to the first uplink resource in the time domain based on the uplink out-of-order configuration. The UE decides the transmission of the first uplink signal according to the condition of resource configuration.

Abstract: A user equipment (UE) and a base station execute a radio access method. The base station receives device type related information of an extended device type user equipment (UE) and provides resource configuration for the extended device type UE based on the device type related information of the extended device type UE. The extended device type UE and the base station performs an initial access procedure according to the resource configuration for the extended device type UE.

Abstract: A user equipment (UE) executes a radio access method. The UE being an extended device type UE obtains, from a base station, connection indication information of a certain device type represented by device type related information of the extended device type UE, determines an initial access scheme based on the connection indication information, and performs an initial access procedure with the base station according to the initial access scheme.

Abstract: A user equipment (UE) and a base station (BS) for a mobile communication system are provided. The UE obtains a first timing advance (TA) value of a source BS, and receives a radio resource control (RRC) connection reconfiguration message for a handover from the source BS to a target BS. The UE calculates a receiving time difference between a receiving time of two synchronization signals respectively transmitted by the source BS and the target BS, and calculates a reference time difference according to first reference time information of the source BS and second reference time information of the target BS. The UE calculates a second TA value of the target BS based on the first TA value, the receiving time difference and the reference time difference.

Abstract: A user equipment (UE) executes a time synchronization method. The UE obtains reference time information (RTI) of a first grant master clock domain and transmits the RTI of the first grant master clock domain to a first base station of a second grant master clock domain to allow the first base station to synchronize with the first grant master clock domain.

Abstract: A user equipment (UE) executes a time synchronization method. The UE transmits a synchronization-specific uplink signal and receives a synchronization-specific downlink signal in response to the synchronization-specific uplink signal. The synchronization-specific uplink signal may comprise a dedicated preamble for propagation-delay-related signaling associated with at least one of timing advance (TA), propagation delay (PD), and propagation delay compensation (PDC) between the UE and a serving base station of the UE.

Abstract: A base station (BS) and a user equipment (UE) for a mobile communication system are provided. The BS transmits a downlink reception indication message, including a serving source configuration and a downlink parameter setting for signal combination, to the UE. The serving source configuration indicates a plurality of serving sources. The BS generates a first downlink signal and a second downlink signal based on a piece of downlink information. The first downlink signal carries a first part of the piece of downlink information and the second downlink signal carries a second part of the piece of downlink information. The BS further transmits the first downlink signal to the UE through the first serving source and transmits the second downlink signal to the UE through the second serving source.

Abstract: A user equipment (UE) for a mobile communication system is provided. The UE receives, from the BS, a first downlink control information (DCI) indicating a first uplink resource for transmitting a first uplink signal, and then receives, from the BS, a second DCI indicating a second uplink resource for transmitting a second uplink signal. The BS configures the second uplink resource to be advanced to the first uplink resource in the time domain based on the uplink out-of-order configuration. The UE decides the transmission of the first uplink signal according to the condition of resource configuration.

Abstract: A user equipment determines a repetition sequence including a plurality of repetitions. The user equipment schedules the repetition sequence in a time slot or in a plurality of consecutive time slots, wherein at least one of the plurality of consecutive time slots is arranged to at least two of the plurality of repetitions. Then, the user equipment transmits the plurality of repetitions to a base station.

Abstract: A base station (BS) for a mobile communication system is provided. As for a user equipment (UE), the BS is a primary BS and connects to a secondary BS. The primary BS calculates the time synchronization error between the primary BS and the UE, and the time synchronization error between the secondary BS and the UE. These time synchronization errors are associated with the subcarrier spacings (SCSs) of the primary and secondary BSs, respectively. According to the calculated time synchronization errors, the primary BS transmits a synchronization indication message to instruct the UE to receive the reference time information of one of the primary and secondary BSs.

Abstract: A base station (BS) and a user equipment (UE) for a mobile communication system are provided. The BS generates an uplink transmission indication message including a serving source configuration and an uplink transmission parameter setting. The serving source configuration indicates a plurality of serving sources. The BS transmits the uplink transmission indication message to the UE. The BS further receives a first uplink signal from the UE through a first serving source of the serving sources.

Abstract: A user equipment (UE) and a base station (BS) for a mobile communication system are provided. The UE performs a random access (RA) procedure with the BS in a radio resource control (RRC) idle mode. The UE transmits a preconfigured uplink resource request message to the BS and receives a configuration message indicating a preconfigured uplink resource from the BS. The UE starts a time alignment timer (TAT) which is used for the RRC idle mode in response to the RA procedure. When the UE determines that there exists an uplink message to be transmitted in the RRC idle mode and determines that the current timing advance (TA) value is valid, the UE transmits the uplink message on the preconfigured uplink resource.

Abstract: A base station (BS) and a user equipment (UE) for a mobile communication system are provided. The BS generates first downlink information (DCI) related to a first service type and transmits the first DCI indicating a first physical uplink control channel (PUCCH) resource to the UE. The BS further generates second DCI related to a second service type and transmits the second DCI indicating a second PUCCH resource to the UE. The first service type and the second service type have different priorities. The starting symbol of the first PUCCH resource is located within a first type assigned sub-slot of a plurality of first type sub-slots of a slot, and the starting symbol of the second PUCCH resource is located within a second type assigned sub-slot of a plurality of second type sub-slots of the slot.

Abstract: A user equipment (UE) and a base station (BS) are provided. The UE transmits a specific preamble on a random access channel and transmits an uplink data signal and a demodulation reference signal (DMRS) on an uplink transmission radio resource so that the BS receives the uplink data signal and the DMRS according to the specific preamble after receiving the specific preamble. The BS transmits a downlink data signal on a downlink transmission radio resource according to the specific preamble so the UE receives the downlink data signal on the downlink transmission radio resource according to the specific preamble.

Abstract: A user equipment (UE) and a base station (BS) are provided. The UE monitors a plurality of semi-persistent scheduling (SPS) physical downlink shared channel (PDSCH) resources, and determines an SPS Hybrid Automatic Repeat reQuest acknowledge (HARQ-ACK) bit order of a plurality of SPS HARQ-ACK bits, corresponding to the SPS PDSCH resources, in a codebook according to a time-domain position, a component carrier index and a configuration index of each SPS PDSCH resource. Afterwards, the UE generates an HARQ-ACK message including the codebook according to the SPS HARQ-ACK bit order, and transmits the HARQ-ACK message on a physical uplink control channel (PUCCH) resource to the BS.

Abstract: A user equipment (UE) and a base station (BS) for a mobile communication system are provided. The UE divides a plurality of uplink radio resources into at least one group and determines whether there exist pieces of uplink information corresponding to the uplink radio resources. When the corresponding pieces of the uplink information exist, the UE determines whether there exist overlapped periods in the time domain among the corresponding uplink radio resources. For any two of the corresponding uplink radio resources having the overlapped period, the UE decides how to transmit the corresponding pieces of uplink information based on whether the two of the corresponding uplink radio resources belonging to the same group or not, whether the corresponding pieces of uplink information can be jointly transmitted or not, and the priorities of the uplink information.